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15 Cards in this Set
- Front
- Back
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What Is Shock?
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Complex syndrome associated with cardiovascular failure to deliver blood 02 nutrients
clinically identifiable manifestations which signal the body's inability to supply o2 to the cells |
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Hypovolaemic Shock
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decreased circulating blood volume leading to decreased cardiac output and reduced tissue perfusion
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Transport Shock
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insufficient haemoglobin to carry the required oxygen to the tissues
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Obstructive Shock
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Inability of the heart to fill properly (tamponade) oro obstruction of outflow from the heart.
Pulmonary embolism,pneumothorax ,cardiac tumours, dissecting aortic aneurysm |
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cardiogenic shock
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circulatory failure caused by inability of a damaged heart muscle L or R ventricle to pump the required amount of volume blood with each stroke
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treatment of shock
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hypo perfusion focus regardless of the underlying cause of classification of shock
goal to achieve adequate perfusion and optimum o2 delivery CO must be restored and maintained |
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Cardiac Output CO
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the amount of blood pumped each minute is a product of HR by SV
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Stroke Volume SV
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dependent on preload, afterload and myocardial contractility
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Preload
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reflects the V of blood in the ventricle at the end of diastole, just before systolic contraction ejects it. If the V increases, the amount ejected increases. FRANK STARLING LAW
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4 stages of shock
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Initial
compensatory progressive refractory |
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Initial
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decreased cardiac output, tissues under perfused increased anaerobic metabolism, increased lactic acid accumulation
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compensatory
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reversible- mechanisms activated to compensate for decreased tissue perfusion
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progressive
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failure of compensatory mechanisms
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refractory
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cellular necrosis and multiple organ dysfunction sydnrome
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Anaphylactic Shock
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severe allergic reaction caused by an antigen antibody
insect venoms pollens shellfish penicillin nuts mast cell degranulation release of mediators resulting in massive vasodilation and severe hypotension |
